Aobosi
Frost Accumulation / Defrost Failure
Excessive frost or ice buildup on the back wall or around the evaporator inside the cabinet.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Door not sealing properly, Frequent door openings, Failed defrost heater (if equipped), Faulty defrost sensor or timer on PCB
How to Fix / Troubleshooting
Safety: Unplug the cooler before defrosting. Do not use sharp tools to remove ice.
- Manual defrost: Remove all bottles, unplug the unit, and leave the door open until all ice melts. Place towels to absorb water.
- Check door gasket and hinges: Ensure the door closes squarely and the gasket seals all around. Adjust hinges or replace gasket if needed.
- Inspect defrost components: If frost returns quickly, remove the interior rear panel to access the evaporator, defrost heater, and sensor. Test the heater and sensor for continuity.
- Replace faulty parts: Install a new defrost heater or evaporator sensor if they test open or out of specification.
- Control board: If heater and sensor are good but defrost never occurs, the defrost control on the main PCB may be faulty and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Defrost Heater or Evaporator Sensor
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